Low temperature sintering and microwave dielectric properties of Li2ZnTi3O8 ceramics doped with ZnO–La2O3–B2O3 glass

Abstract Li 2 ZnTi 3 O 8 ceramics doped with ZnO–La 2 O 3 –B 2 O 3 glass were prepared by the conventional solid-state ceramic route. The effects of the ZnO–La 2 O 3 –B 2 O 3 glass on the sintering temperature, phase composition, microstructure and microwave dielectric properties of Li 2 ZnTi 3 O 8 ceramics were investigated. The addition of ZLB glass can reduce the sintering temperature of Li 2 ZnTi 3 O 8 ceramic from 1075 °C to 925 °C without obvious degradation of the microwave dielectric properties. Only a single phase Li 2 ZnTi 3 O 8 with cubic spinel structure is formed in Li 2 ZnTi 3 O 8 ceramic with ZLB addition sintered at 925 °C. Typically, 1.0 wt% ZLB-doped Li 2 ZnTi 3 O 8 ceramic sintered at 925 °C can reach a maximum relative density of 95.8% and exhibits good microwave dielectric properties of e r =24.34, Q × f =41,360 GHz and τ f =−13.4 ppm/°C. Moreover, this material is compatible with Ag electrode, which makes it a promising candidate for LTCC application.